Radon activity in
slate mines in the aravali range in Haryana was measured to protect the
occupational workers and general public from radiation. The alpha sensitive
LR-115 type II plastic track detectors (solid state nuclear track detectors)
were used for the measurements. Results of various measurements of the radon
activity and inhalation dose received by the workers have been reported. The
radon activity and the annual inhalation dose in the environment of various
slate stone mines in Haryana varied from 21 to 113 Bq m-3 with an average of 38.5 ± 5.8 Bq m-3 and 0.37 to 1.94 mSv with an average
of 0.66 ± 0.10 mSv, respectively. Seasonal variation of radon activity has also
been studied and reported.